From patchwork Wed Aug 26 12:02:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 264891 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DCFD7C433E1 for ; Wed, 26 Aug 2020 12:03:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B07CB2087C for ; Wed, 26 Aug 2020 12:03:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598443431; bh=lHjVCNb+Y24qQJ+20TP7JRBp6qoTPqc/m8f2Ri154yw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MV3HqxctnnkABmf1JdAl/uj4KR4/T2okH1iwtdFO1h+fMDyscbkXH0uKh2bROwldQ exX9azgEZZhwy6kEF69KlUlI/wm5JTe7hbhevAcOp84FKNkNF0pYr3drtTLgmUFAwZ jKWI4YcMuwPDAUhmTluXBL49CTrck9xWWSBwqhJI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729560AbgHZMDs (ORCPT ); Wed, 26 Aug 2020 08:03:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:39152 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729554AbgHZMDq (ORCPT ); Wed, 26 Aug 2020 08:03:46 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 340C420897; Wed, 26 Aug 2020 12:03:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598443426; bh=lHjVCNb+Y24qQJ+20TP7JRBp6qoTPqc/m8f2Ri154yw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=drr4RbRU0aCN/vSLebOaVPUJV0DcJSFuWT3ge1fLmr0euxeGPpHWmu1YbY7xPPYjd QEqVAqXADeHiBhGxJxIYl1o/7RQOrIng4TecQjZJGPyy27G6x4ymSzOICHC2qiB76H oKrRrjXbfdAyaS5RLbsKcEK6hfe2ERemF0Weh0wU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Laight , Marcelo Ricardo Leitner , "David S. Miller" Subject: [PATCH 5.8 06/16] net: sctp: Fix negotiation of the number of data streams. Date: Wed, 26 Aug 2020 14:02:43 +0200 Message-Id: <20200826114911.533728228@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200826114911.216745274@linuxfoundation.org> References: <20200826114911.216745274@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: David Laight [ Upstream commit ab921f3cdbec01c68705a7ade8bec628d541fc2b ] The number of output and input streams was never being reduced, eg when processing received INIT or INIT_ACK chunks. The effect is that DATA chunks can be sent with invalid stream ids and then discarded by the remote system. Fixes: 2075e50caf5ea ("sctp: convert to genradix") Signed-off-by: David Laight Acked-by: Marcelo Ricardo Leitner Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/sctp/stream.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/net/sctp/stream.c +++ b/net/sctp/stream.c @@ -88,12 +88,13 @@ static int sctp_stream_alloc_out(struct int ret; if (outcnt <= stream->outcnt) - return 0; + goto out; ret = genradix_prealloc(&stream->out, outcnt, gfp); if (ret) return ret; +out: stream->outcnt = outcnt; return 0; } @@ -104,12 +105,13 @@ static int sctp_stream_alloc_in(struct s int ret; if (incnt <= stream->incnt) - return 0; + goto out; ret = genradix_prealloc(&stream->in, incnt, gfp); if (ret) return ret; +out: stream->incnt = incnt; return 0; }